Most of my riding is commuting, so I don't really differentiate "fun rides" from "commutes"

However, I don't see the dichotomy.

I've seen quite a few people on recreational rides with rear blinkers.

Bright clothing and good visibility is good... and keeps one safe no matter the activity.

Personally I'd rather be safe and alive than "cool" and dead.

And, after a day on my cargo bike pulling a few hundred pound trailer... it can be nice to jump on the road bike with nothing behind it